Sonar for Automated Treadmill (IMAGE) Ohio State University Caption This sonar device is placed behind the treadmill to measure where the runner is on the running belt. Credit Photo by Jo McCulty, Courtesy of Ohio State University Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.